Protein Electrophoresis
Immunofixation Electrophoresis

They may do a serum electrophoresis because you may have an abnormality even though the total protein and albumin are normal. This is because the body tries to maintain a constant amount of protein and may increase or decrease its production of other proteins to compensate for a deficiency or overproduction of others. Your doctor may request a urine electrophoresis when there is protein in your urine, because you may lose protein in your urine even if your blood levels are fairly stable.

Yes, any time separation of molecules is desired. DNA electrophoresis, for instance, is used to help study the genetic makeup of plants, animals, and humans.